linux-kernel - [76/80] perf: Fix parsing of __print_flags() in TP

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Message-Id: <20111207160828.820007360@clark.kroah.org>
Date:	Wed, 07 Dec 2011 08:07:36 -0800
From:	Greg KH <gregkh@...e.de>
To:	<linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>
Cc:	<torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>,
	<alan@...rguk.ukuu.org.uk>, Steven Rostedt <rostedt@...dmis.org>
Subject: [76/80] perf: Fix parsing of __print_flags() in TP_printk()

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steven Rostedt <srostedt@...hat.com>

commit d06c27b22aa66e48e32f03f9387328a9af9b0625 upstream.

A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause perf to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Reported-by: Andrew Vagin <avagin@...nvz.org>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 tools/perf/util/trace-event-parse.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1537,6 +1537,8 @@ process_flags(struct event *event, struc
 	field = malloc_or_die(sizeof(*field));
 
 	type = process_arg(event, field, &token);
+	while (type == EVENT_OP)
+		type = process_op(event, field, &token);
 	if (test_type_token(type, token, EVENT_DELIM, ","))
 		goto out_free;
 


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